Layout device



C. E. HAWKES.

LAYOUT DEVICE.

APPLICATION FILED SEPT. 9, 1919.

1,370,645. I PatentedMar. 8,1921.

. UNITED STATES-PATENT OFFICE.

cur-roman nawxn's, or BROOKLYN, NEW Yonx.

LAYOUT DEVICE.

Application filed September 9, 1919. Serial No. 322,632.

T 0 all whom it may concern: 1

Be it known that I, CLIFFORD E. HAwKns, a citizen of the United Statesand resident of 183 Midwood St., Brooklyn, in the county of Kings andState of New York, have 1nvented certain new and useful Improvements inLayout Devices, of WhlCll the following is a specification.

This invention relates to layout devlces, that is, a tool for laying outwork on a plane surface and has for an ob ect to 1ncrease the accuracyof work of this character, facilitate the operation and ncrease thespeed in laying out Work of this character. These objects are obtainedby the construction shown in the accompanying drawmgs in which, Figure1, is a plan vlew of my 1mproved layout device, Fig. 215 a sideelevation, Fig. 3 is an end elevation, Flg. 4 1s a detail partly insection and Fig. 5 1s a detail of an extension for the stand of theinstrument.

In laying out work to be machined lines are transferred from the drawingto the work and at the intersection of these llnes center punch marksare made by hand to spot the drilling of holes, to mark the llmits of amachining operation etc. The pres ent invention provides for spottingthese positions on the work by a micrometer adjustment directly from thelines of the drawing and provides a means whereby the center punch willspot the position wlth absolute accuracy. This is an important featureof the invention as it is impossible, by hand, to position a centerpunch absolutely perpendicular to the surface on wh ch it is used. It isalso superior to center punches with a guide inasmuch as it is locatedwith a micrometer adjustment with absolute accuracy and without regardto irregularities on the surface on which it is used.

This layout device'consists of a surface plate 11 to which the fourposts 12 are secured. On one side these posts support the slide bar 13and on the other side theysupport the slotted bar 14. Across these twobars the slotted bar 15 is placed snugly fitting a groove in the saddle16 which is maintained at right angles to bar 14 by a T nut similar to'18, Fig. 4 engaging the slot 19 in this bar. Bar 15 supports the slide17 which carries the main part of the mechanism. A lead screw 19 isprovided in the slot of bar 14 which is operated by handle 20, an index23 being provided to show the extent in decimal fractions of-itsoperation. This screw engages the T nut on the under side of the saddle16 and thereby moves cross bar 15 back and forth in response to handle20. A similar lead screw' 21 is provided in slot of bar 15 operated byhandle 22 with a micrometer index 24 to show fractional movements. Onthe slide 17 a nut 18 is provided engaging with lead screw 21, hencethis slide is operated back and forth in response to handle 22. Thisconstruction is equivalent to a compound slide rest Well known incertain classes of .to be marked is placed on the face plate 11,

and the sides of the article may be positioned against the guide bars 51and 52 on the face plate; the center punch 31 is replaced by a set plugsimilar to 55 and positioned relative to the base line from which thedimension is to be read. Set plugs of this kind are well known in thetool-makin art, consisting as shown in Fig. 4, of a comcal point with aflat side, this fiat side can be accurately sighted on the base linefrom which the dimensions are read. The lead screw 20 is now operateduntil the graduated scale 25 and the index 23 measure off the dimensionrequired, this locates the position in one direction. This'operation isrepeated with reference to moving slide 17 from another base lineaccording to the di mensions indicated by the scale 26 and the index 24,this locates an intersecting position upon imaginary lines drawn fromtwo sides and thus accurately locates the position for the center punchwithout scribing the work and without disturbing the setting of thecenter punch after it is obtained.

The set plug is replaced by the center punch in sleeve 34 and atap fromthe ham- Iner locates the point.

The extension 35 is positioned horizontally by the knuckle 61 on hinge36, this part, however, is free to turn upward in the arc of a circle,the hinge member being cut away at 62 for this purpose the angle throughwhich it moves being indicated by the protractor 37 secured in place bythe Patented Mar. 8, 1921.

that may be protruding from the work inserted below. This movement alsoenables the work to be quickly and easily inspected and forms a yieldingconnection in case the I punch 31 is accidentally obstructed.

This gage also provides for measuring angles about a center located bpunch 31'. This is secured by the horizonta protractor 4.5 which carriesthe plate 48 Fig. 4:, and is arran ed to move about the axis of punch31. he zero mark of the protractor corresponds to a zero mark on 35 (notshown) when in the position shown in Fig. 1. Angular variations ineither direction can thus be easily read. An adjustable extension 42 issecured to this plate by the screw 44 engaging the slot 43 in extension42. A sleeve 41 similar to sleeve 34 is inserted in the end of 42, inwhich sleeve a punch similar to 31 may be inserted. This punch can,there. fore be used to accurately set off angles as indicated by theprotractor 45 at various radii about'a centerwhich is located by themicrometer adjustment. The supporting posts 12 may be unscrewed in themiddle and extensions 12 Fig. 5, inserted to lengthen these posts whenit is desired to increase the height of the punches above the baseplate.

Having thus described my invention, I claim: a

1. In a layout device of the class described, a base plate, supporting astand, a movable carriage on said stand supporting a spring retrievedcenter punch, means whereby said punch may be moved at an angle to saidbase plate and means for adjusting the position of said carriage in twodirections.

8. In a layout device of the class described. a baseplate supporting astand, a

carriage, a plurality of micrometer screws, said screws arranged to movesaid carriage on said supporting stand, a spring retrieved punchsupported by said carriage, means for operating said micrometer screwsfor positioning said carriage in two directions and means whereby saidcenter punch may be moved angularly in a vertical plane.

3. In a layout device of the class described, a base plate supporting astand, a'movable carriage on said stand supporting. a 'center punch,micrometer means for positioning said carriage in two directions atright angles to each other, means whereby said punch may be movedangularly in a vertical plane, and an index to show the position of saidpunch.

4. In a, layout device'of the class described, a base plate supporting astand.

a movable carriage supported by said stand and supporting a centerpunch, a set plug, a horizontal protractor having the same axis as saidcenter punch, an adjustable extention arm secured to said protractor andadapted to support said set plug.

5. In a layout device of the class described,

, a base plate supporting a stand, a movable carriage supported by saidstand and supporting a center punch, a set plug, a protractor having thesame axis as said center punch, an arm secured to said protractor andadapted to support said set plug, micrometer means for positioning saidcarriage in two directions and means whereby said set plug may bepositioned by said protractor.

6. In a layout device of the classdescribed, a base plate supporting astand, a movable carriage supported by said stand and supporting acenter punch, a protractor having the same axis as said center punch andsupporting a set plug, said carriage being movable in a horizontalplane, and means whereby said center punch and set plu may be moved in avertical plane.

S igned at Brookl n, in the county of Kin s and State of ew York this3rd day of ept. A. D. 1919.

CLIFFORD E. HAWKES.

